1.
Introduction
1.1
Project
Background
1.1.1
Civil Engineering and
Development Department (hereafter
referred as “CEDD”) is the Project Proponent and the Permit Holder of Agreement
No. CE 59/2005 (EP) Development of a Bathing Beach at Lung Mei, Tai Po (hereinafter referred as “the Project”),
which is a Designated Project to be implemented under Environmental Permit
number EP-388/2010 (hereinafter referred as “the EP-388/2010” or “the EP”).
1.1.2
The major construction activities of the Project comprise
construction of 200-metre long bathing beach with a groyne at
each end, a shark prevention net; a public car park; retaining walls; and the
associated roadworks, drainage and sewerage works. Layout plan
of the Project is shown in Appendix A. Designated
works of the Project under the EP shall include:
(i)
Construction of a 200m long beach with a groyne
at each end of the beach which includes dredging and sandfilling
works;
(ii)
Construction of one culvert at the eastern side of the beach and another
small section of culvert and open drainage channel with gabion embankments at
the western end, both to collect and divert surface runoff from upstream
locations; and
(iii)
Construction of a beach building with associated beach building
facilities, kiosk and a carpark and associated road improvement works adjoining
the facility.
1.1.3
CEDD is Site Resident Engineers
(hereinafter referred as “SRE”) responsible for the Project management; Welcome
Construction CO., Ltd is a Main Contractor
(hereinafter referred as “Contractor”) responsible to construction of the Project Works; and Action-United Environmental
Services & Consulting (hereinafter
referred as “AUES”) has been commissioned as an Independent Environmental Team
(hereinafter referred as “the ET”) to implement the relevant EM&A
program in accordance with the approved
EM&A Manual, as well as the associated duties. Moreover, Environmental Resources
Management is
Independent Environmental Checker (hereinafter
referred as “IEC”) of the Project.
1.1.4
As part of the EM&A program, baseline monitoring to
determine the ambient environmental conditions including air quality, noise and
water quality were undertaken between 7 June 2017 and 21 October 2017. After completed baseline monitoring, Baseline Monitoring Report for Air Quality and Noise (AUES Ref.: TCS00874/16/600/R0022v3) and Baseline
Monitoring Report for
Water Quality (AUES Ref.:
TCS00874/16/600/R0036v2) has been verified by IEC and submitted to EPD for endorsement. These baseline monitoring reports has summarized
the key findings of baseline condition and
determined a set of Action and Limit Levels
(A/L Levels) based on the baseline data.
The A/L Levels will
serve as the yardsticks for assessing the acceptability of the environmental
impact during construction phase of the Project Works impact monitoring.
1.1.5
The construction phase of the Project commenced on 1st December 2017.
Accordingly, the impact monitoring of the EM&A programme commenced on the
same date
1.1.6
This is the 5th monthly
EM&A report presenting the monitoring results and inspection findings for
the reporting period from 1 to 30 April
2018.
1.2
Report
Structure
1.2.1
The Monthly Environmental Monitoring and Audit (EM&A)
Report is structured into the following sections:-
Section 1 Introduction
Section 2 Project Organization
and Construction progress
Section 3 Summary of Impact
Monitoring Requirements
Section 4 Air Quality
Monitoring
Section 5 Construction Noise
Monitoring
Section 6 Water Quality
Monitoring
Section 7 Waste Management
Section 8 Ecology
Section 9 Site Inspection
Section 10 Environmental
Complaint and non-compliance
Section 11 Implementation Status
of Mitigation Measures
Section 12 Conclusion and
Recommendation
2.
Project Organization and
Construction Progress
2.1 Project Organization and Management
Structure
2.1.1
Organization
structure and contact details of relevant parties with respect to on-site
environmental management are shown in Appendix B.
The responsibilities of respective parties are:
Engineer or Engineers Representative (ER)
2.1.2
The
ER is responsible for overseeing the construction works and for ensuring that
the works are undertaken by the Contractor in accordance with the specification
and contract requirements. The duties and responsibilities of the ER with
respect to EM&A are:
·
monitor
the Contractor’s compliance with contract specifications, including the
effective implementation and operation of environmental mitigation measures and
other aspects of the EM&A programme;
·
instruct
the Contractor to follow the agreed protocols or those in the Contract
Specifications in the event of exceedances or complaints;
·
comply
with the agreed Event and Action Plans in the event of any exceedance;
·
liaise
with the IEC and assist as necessary in the implementation of the EM&A
program; and
·
participate
in joint site inspection undertaken by the EI and IEC.
The Contractor
2.1.3
The
duties and responsibilities of the Contractor are:
·
work
within the scope of the construction contract and other tender conditions;
·
provide
assistance to the ET in carrying out monitoring;
·
ubmit
proposals on mitigation measures in case of exceedances of Action and Limit
levels in accordance with the Event and Action Plans;
·
implement
measures to reduce impact where Action and Limit levels are exceeded;
·
implement
the corrective actions instructed by ER/ET/IEC;
·
participate
in the site inspections undertaken by the ET and the IEC, as required, and
undertake any corrective actions instructed by ER/ET/IEC; and
·
adhere to
the procedures for carrying out complaint investigation.
Environmental
Team (ET)
2.1.4
The
ET will be led and managed by the ET Leader. The ET leader will have relevant
education, training, knowledge, experience and professional qualifications and
the appointment will be subject to the approval of the Director of Environmental
Protection and ER. Suitably
qualified staff will be included in the ET, and the ET should not be in any way
an associated body of the Contractor or the Independent Environmental Checker
(IEC) for the Project.
2.1.5
The
duties and responsibilities of the ET are:
·
monitor
various environmental parameters as required in this EM&A Manual;
·
assess
the EM&A data and review the success of the EM&A programme determining
the adequacy of the mitigation measures implemented and the validity of the EIA
predictions as well as identify any adverse environmental impacts before they
arise;
·
carry
out regular site inspection to investigate and audit the Contractor’s site
practice, equipment and work methodologies with respect to pollution control
and environmental mitigation, and effect proactive action to pre-empt issues;
·
review
the Contractor’s working programme and methodology, and comment as necessary;
·
review
and prepare reports on the environmental monitoring data, site environmental
conditions and audits;
·
report
on the environmental monitoring and audit results and conditions to the IEC,
Contractor, EPD and ER;
·
recommend
suitable mitigation measures to the Contractor in the case of exceedance of
Action and Limit levels in accordance with the Event and Action Plans;
·
adhere
to the procedures for carrying out complaint investigation; and,
·
the ET
Leader will keep a contemporaneous log-book and record each and every instance
or circumstance or change of circumstances which may affect the environmental
impact assessment and every non-conformance with the recommendations of the EIA
Reports or the EPs.
Independent
Environmental Checker (IEC)
2.1.6
The
duties and responsibilities of the IEC are:
·
review
and monitor the implementation of the EM&A programme and the overall level of
environmental performance being achieved;
·
arrange
and conduct monthly independent site inspections/audits of the works;
·
validate
and confirm the accuracy of monitoring results, monitoring equipment,
monitoring stations, monitoring procedures and locations of sensitive
receivers;
·
carry
out random sample check and audit on monitoring data and sampling procedures, etc;
·
audit
the EIA recommendations and requirements against the status of implementation
of environmental protection measures on site;
·
on
needed basis, audit the Contractor’s construction methodology and agree the
appropriate, reduced impact alternative in consultation with ER, the ET and the
Contractor;
·
provide
specialist advice to ER and the Contractor on environmental matters;
·
check
complaint cases and the effectiveness of corrective measures;
·
check
that the necessary mitigation measures recommended in the EIA, EP and Contract
documents, or as subsequently required, are effectively implemented;
·
review
EM&A report submitted by the ET leader and feedback audit results to ET by
signing off relevant EM&A proformas;
·
report
the findings of site inspections/ audits and other environmental performance
reviews to ER, ET, EPD and the Contractor;
2.2
Construction
Progress
2.2.1
The 3-month rolling construction program is enclosed in Appendix C and the major construction
activities undertaken in the Reporting Period are listed below:-
·
Site formation
·
Construction of Groynes (Eastern and Western)
·
Construction of Western Box Culvert
2.3 Summary of Environmental Submissions
2.3.1
Summary
of currently relevant permits, licenses, and/or notifications on environmental
protection for this Project in this Reporting Period is presented in Table
2-1.
Table 2-1 Status of Environmental Licenses and Permits
|
Item
|
Description
|
License/Permit Status
|
|
Permit
no./Account no./ Ref. no.
|
From
|
To
|
|
1
|
Air pollution Control (Construction Dust) Regulation
|
Ref. Number: 418137
|
N/A
|
N/A
|
|
2
|
Chemical Waste Producer Registration
|
Waste Producers Number (WPN):
PN5213-728-W3437-01
|
21 August 2017
|
End of Project
|
|
3
|
Water Pollution Control Ordinance
|
License No.: WT00028905-2017
|
24 October 2017
|
31 October 2022
|
|
4
|
Waste Disposal (Charges for Disposal of Construction Waste)
Regulation
|
Billing Account for Disposal of
Construction Waste: Account No. 7017686
|
3 July 2013
|
End of Project
|
2.3.2
The submission status as under the EP requirement is presented in Table
2-2.
Table 2-2 Submission Status as under the EP Stipulation
|
Item
|
EP
condition
|
Description
|
Status
|
|
1
|
2.3
|
Management
Organization of the Main Construction Companies
|
The updated version to be submitted in May 2018
|
|
2
|
2.4
|
Report
for Capture and Relocation of Common Rat Snake
|
Approved by EPD on 15 Sep 2017 (EPD ref.: (15) in EP2/N5/C/46 Pt.6
dated 15 Sep 2017)
|
|
3
|
2.5
|
Landscape
Plan
|
Submitted to EPD on 28 June 2017
|
|
4
|
3.12
|
Mangrove Seedling Planting Proposal
|
Not
yet submitted
|
|
5
|
3.13
|
Detailed Landscape As-built Drawing(s)
|
Not
yet submitted
|
|
6
|
4.3
|
Baseline
Monitoring Report for Air Quality and Noise (AUES Ref.: TCS00874/16/600/R0022v3)
|
Approved by EPD on 8 Jan 2018 (EPD ref.: (36) in EP2/N5/C/46 Pt.6
dated 8 Jan 2018)
|
|
7
|
Baseline Monitoring Report for Water
Quality(AUES Ref.: TCS00874/16/600/R0036v2)
|
Approved by EPD on 10 Jan 2018 (EPD ref.: (37) in EP2/N5/C/46 Pt.6
dated 10 Jan 2018)
|
3.
Summary of Impact Monitoring
Requirements
3.1
General
3.1.1
The
Environmental Monitoring and Audit requirements are set out in the EM&A
manual. Environmental issues such as air quality, construction noise and water
quality were identified as the key issues during the construction phase of the
Project. A summary of the EM&A
requirements for air quality, noise monitoring and water quality are presented
in the sub-sections below.
3.2
Monitoring
Parameters
3.2.1
According
to the Project EM&A Manual, the Impact monitoring program covers the
following environmental issues:
Ÿ
Air Quality;
Ÿ
Construction Noise; and
Ÿ
Water Quality
3.2.2
A
summary of the monitoring parameters is presented in Table 3-1 below.
Table 3-1 Summary
of EM&A Impact Monitoring Requirements
|
Environmental Issue
|
Parameters
|
|
Air Quality
|
Ÿ 1-hour TSP
Ÿ 24-hour TSP
|
|
Noise
|
Ÿ
Leq (30min) in six consecutive Leq(5 min)
between
07:00-19:00 on normal weekdays
|
|
Water Qaulity
|
In-situ Measurements
Ÿ
Dissolved
Oxygen Concentration (mg/L);
Ÿ
Dissolved
Oxygen Saturation (% );
Ÿ
Salinity
(mg/L);
Ÿ
Temperature
(℃);
Ÿ
Turbidity
(NTU);
Ÿ
pH
unit;
Ÿ
Current
direction (degree);
Ÿ
Current
speed (m/s); and
Ÿ
Water
depth (m)
Laboratory Analysis
Ÿ
Suspended
Solids (mg/L); and
Ÿ
Chlorophyll-a (µg/L)
|
3.3
Monitoring
Locations
Air Quality
3.3.1
There are air quality monitoring
locations (A4 and A6) recommended
in Section
3.1 of the EM&A Manual. During liaison with the landlord of A6,
he refused to provide access
and
location for installation of High Volume Air
Sampler (HVAS). Therefore, alternative location (A7) was proposed by ET in accordance with
Section 3.4 of the EM&A Manual. The proposed alternative locations are
considered capable of effectively representing the baseline conditions at the
impact monitoring locations. The proposal (ref no.: TCS00874/16/300/L0016b) for alternative monitoring locations was verified by IEC and it has been submitted to EPD for approval on 8 May 2017. The air quality monitoring locations
are in Table 3-2 and illustrated in Appendix D.
Table
3-2 Location of Air Quality Monitoring
|
Station ID
|
Location
|
|
A4
|
No. 101 Lung Mei Tsuen
|
|
A7
|
Hong Kong Eco-Farm
|
Construction Noise
3.3.2
According to Section 4.1 of the EM&A Manual, four designated noise sensitive receivers (N1, N2, N3 and
N4) were
recommended and they are
listed in Table 3-3 and illustrated in Appendix D.
Table
3-3 Designated
Noise Monitoring Station according to the EM&A Manual
|
NSR
|
Location
|
|
N1
|
Village house - No.
165A Lung Mei
|
|
N2*
|
Village house - No.
103 Lung Mei
|
|
N3
|
Village house - No.
70 Lo Tsz Tin
|
|
N4
|
Village house - No.
79 Lo Tsz Tin
|
Remarks:
(*) Noise monitoring
should be conducted at N2a (i.e House No. 101 Lung
Mei) if it is changed to residential use during construction phase.
3.3.3
As confirmed on the first day of baseline
monitoring, N2a (House no. 101 Lung Mei) has been changed to residential use. Therefore, the noise monitoring is
conducted at N2a and to replace N2.
Moreover, due to the
lack of accessibility of noise monitoring at NSR N3 (Village house – No. 70 Lo Tsz Tin), alternative location was proposed to replace N3 to carry out the
noise monitoring.
Having reviewed the surrounding condition, NSR N3a (Village house – No. 66C Lo Tsz Tin)
was proposed with the rationales summarized in below.
1)
The distance
between N3 and N3a is about 18 meter apart and N3a locates at close proximity of
the project site and major site activities which are likely to have noise
impacts;
2)
N3a is a village
type residential house and it is a noise sensitive receiver (NSR);
3)
Accessibility for
noise monitoring work at N3a is available; and
4)
Minimal disturbance
would be only caused to the proposed monitoring location N3a.
3.3.4
The
proposal (ref no.: TCS00874/16/300/L0016b)
for alternative monitoring locations was verified by IEC and it has been submitted to EPD for approval on 8 May 2017. The noise monitoring stations under
the EM&A programmes are listed in Table 3-4 and illustrated in Appendix D.
Table
3-4 Noise Monitoring Stations of the EM&A Programme
|
Station
ID
|
Address
|
|
N1
|
Village house No.
165A of Lung Mei
|
|
N2a
|
Village house No.
101 of Lung Mei
|
|
N3a
|
Village house No.
66C of Lo Tsz Tin
|
|
N4
|
Village house No.
79 of Lo Tsz Tin
|
Water Quality
3.3.5
According
to Section 5.1.2 of the Approved EM&A Manual, two Reference
Stations (R1 and R2), three impact stations (I1, I2
and I3), three sensitive receivers (FCZ1, W1 and M1) and one Gradient station (G1), were identified to perform water quality monitoring. Detailed and co-ordnance of water
quality monitoring stations is described in Table 3-5 and the graphical is shown in Appendix D.
Table
3-5 Location
of Marine Water Quality Monitoring Station
|
Station
|
Coordinates
|
Description
|
|
Easting
|
Northing
|
|
G1
|
841483.9
|
835936.1
|
Gradient Station - to assist in the identification of the source of any impact.
|
|
R1
|
842307.4
|
835718.4
|
Reference Station - for the background water quality for Tolo Harbour as it is at the
channel where the water exchange between the enclosed Plover Cove and Tolo Harbour take place. It is
located at south of the Project dredging/sandfilling
area.
|
|
R2
|
840739.4
|
836212.4
|
Reference Station - for the background water quality in the Plover
Cove region. It is located at
southwest of the Project dredging/sandfilling area.
|
|
I1
|
841338.5
|
836588.5
|
Impact Station - located outside the mixing zone of dredging/sandfilling
works of the Project.
|
|
I2
|
841590.3
|
836601.2
|
Impact Station - located outside the mixing zone of dredging/sandfilling
works of the Project.
|
|
I3
|
841807.0
|
836680.9
|
Impact Station - located outside the mixing zone of dredging/sandfilling
works of the Project.
|
|
W1
|
841858.9
|
836571.0
|
Sensitive Receiver - located at the Water Sport Centre, which is about 0.25 km distance
to the southeast of the dredging/sandfilling area.
|
|
M1
|
840822.2
|
836416.4
|
Sensitive Receiver - located at the Ting Kok SSSI,
which is about 0.8 km distance to the west of the dredging/sandfilling area.
|
|
FCZ1
|
841180.6
|
835230.8
|
Sensitive Receiver - located at the Yim Tin Tsai East Fish Culture Zone, which is about
1.5 km distance to the southwest of the dredging/sandfilling
area.
|
3.4
Monitoring
Frequency and Period
3.4.1
The frequency and the duration
for impact monitoring are summarized below.
Air Quality Monitoring
|
Ÿ Parameters:
|
1-hour TSP and 24-hour TSP
|
|
Ÿ Frequency:
|
3 times every six
days for 1-hour TSP and once every 6 days for 24-hour TSP
|
|
Ÿ Duration:
|
Throughout the
construction period
|
Noise Monitoring
|
Ÿ Parameters:
|
LAeq(30min) and statistical results L10 & L90
|
|
Ÿ Frequency:
|
Leq (30min) in 6
consecutive Leq(5min) for once a week during 07:00-19:00
on normal weekdays
|
|
Ÿ Duration:
|
Throughout the
construction period
|
Water Quality (Marine) Monitoring
|
Ÿ Parameters:
|
In-situ measurements including water depth, Dissolved Oxygen (DO)
concentration (mg/L) & saturation (%), Salinity (mg/L), Temperature (ºC)
and Turbidity (NTU); and Suspended
Solids (mg/L) and Chlorophyll-a (µg/L) are analyzed by HOKLAS-accredited laboratory.
|
|
Ÿ Frequency:
|
Three days a week, at mid ebb and mid flood
tides. The interval between 2 sets of monitoring will be
more than 36 hours.
|
|
Ÿ Sampling Depth
|
1) Three depths: 1m
below water surface, 1m above sea bottom and at mid-depth when the water
depth exceeds 6m;
2) If the water depth
is between 3m and 6m, two depths: 1m below water surface and 1m above sea
bottom; and
3) If the water depth
is less than 3m, 1 sample at mid-depth is taken
|
|
Ÿ Duration:
|
During marine works proceeding such as the
dredging and sand filling
|
3.4.2
In addition to the water quality parameters,
other relevant data will also be to measure and record, which are included the
location of the sampling stations, water depth, time, weather conditions, sea
conditions, tidal stage, current water flow direction and speed, special
phenomena and work activities undertaken around the monitoring and works area
that may influence the monitoring results.
Observations on any special phenomena and work underway at the Project
site during the time of sampling will also be to record.
3.5
Monitoring
Instrument
Air Quality Monitoring
3.5.1
The
24-hour and 1-hour TSP levels shall be measured by following the standard high
volume sampling method as set out in the Title
40 of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B. If the ET
proposes to use a direct reading dust meter to measure 1-hour TSP levels, it
shall submit sufficient information to the IEC to prove that the instrument is
capable of achieving a comparable results to the HVS. The instrument should be calibrated
regularly, and the 1-hour sampling shall be determined on yearly basis by the
HVS to check the validity and accuracy of the results measured by direct
reading method. The filter paper of 24-hour
TSP measurement shall be determined by HOKLAS accredited laboratory.
3.5.2
All
equipment to be used for air quality monitoring is listed in Table
3-6.
Table 3-6 Air
Quality Monitoring Equipment
|
Equipment
|
Model
|
|
24-Hour TSP
|
|
High Volume Air Sampler
|
TISCH High Volume Air Sampler, HVS Model TE-5170
|
|
Calibration Kit
|
TISCH Calibration
Kit Mode TE-5025A
|
|
1-Hour
TSP
|
|
Portable Dust Meter
|
Sibata LD-3B Laser Dust Meter
|
Noise Monitoring
3.5.3
Sound level meter in
compliance with the International Electrotechnical
Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1)
specifications shall be used for carrying out the noise monitoring. The sound level meter shall be checked
using an acoustic calibrator. The
wind speed shall be checked with a portable wind speed meter capable of
measuring the wind speed in ms-1 for reference.
3.5.4
Monitoring
equipment to be used for construction noise measurement is listed in Table
3-7.
Table 3-7 Construction
Noise Monitoring Equipment
|
Equipment
|
Model
|
|
Integrating
Sound Level Meter
|
Rion
NL-31 or Rion NL-52
|
|
Acoustic Calibrator
|
Rion
NC-74 or Rion
NC-73
|
|
Portable
Wind Speed Indicator (#)
|
Anemometer AZ
Instrument 8908
|
(#) Wind
speed is reference data only and there is no calibration
certificate for portable wind speed indicator.
Water Quality Monitoring
3.5.5
For water quality
monitoring, the used equipment should be fulfill the requirements under the Approved EM&A
Manual Section 5.1.1. Requirement of instruments is described in the
following sections.
3.5.6
Instruments to be used for Water
quality monitoring is listed in Table 3-8.
Table 3-8 Instrument
of Water Quality Monitoring
|
Equipment
|
Model
|
|
A Digital
Global Positioning System
|
GPS12 Garmin
|
|
Water Depth Detector
|
Eagle Sonar CUDA 300
|
|
Water Sampler
|
A 2-litre transparent PVC cylinder with
latex cups at both ends or teflon/stainless steel
bailer or self-made sampler
|
|
Thermometer & DO meter
|
YSI
Professional Plus Multifunctional Meter
|
|
pH meter
|
|
Turbidimeter
|
|
Salinometer
|
|
Current Meter
|
Valeport Ltd – Model 106 Self Recording/Direct Reading Current Meter
|
|
Storage Container
|
‘Willow’ 33-litre plastic cool box with Ice pad
|
3.6
Monitoring
Procedures
Air Quality
1-hour TSP
3.6.1
Operation of the 1-hour TSP meter will follow manufacturer’s Operation and Service Manual.
3.6.2
The 1-hour TSP monitor, brand named “Sibata LD-3B Laser Dust Meter” is a portable, battery-operated laser photometer.
The 1-hour TSP meter provides a real
time 1-hour TSP measurement based on 900 light scattering. The
1-hour TSP monitor consists of the following:
a.
A pump to draw
sample aerosol through the optic chamber where TSP is measured;
b.
A sheath air
system to isolate the aerosol in the chamber to keep the optics clean for
maximum reliability; and
c.
A built-in data
logger compatible with Windows based program to facilitate data collection,
analysis and reporting.
3.6.3
The 1-hour TSP meter to be used will
be within the valid period, calibrated by the
manufacturer prior to purchasing. Zero response of the instrument will
be checked before and after each monitoring
event. Annually calibration with
the High Volume Sampler (HVS) in same condition would be undertaken by the
Laboratory.
24-hour TSP
3.6.4
The
equipment used for 24-hour TSP measurement is the High Volume Sampler (hereinafter the
“HVS”) brand named TISCH, Model TE-5170 TSP High Volume Air Sampler, which
complied with EPA Code of Federal
Regulation, Appendix B to Part 50.
The HVS consists of the following:
a.
An
anodized aluminum shelter;
b.
A
8”x10” stainless steel filter holder;
c.
A
blower motor assembly;
d.
A
continuous flow/pressure recorder;
e.
A
motor speed-voltage control/elapsed time indicator;
f.
A
7-day mechanical timer, and
g.
A
power supply of 220v/50 hz
3.6.5
For
HVS for 24-hour TSP monitoring,
the HVS is mounted in a metallic cage with a top for protection and also it is
sat on the existing ground or the roof of building. The flow rate of the HVS between 0.6m3/min
and 1.7m3/min will be properly set in accordance with the
manufacturer’s instruction to within the range recommended in EPA Code of Federal Regulation, Appendix B to Part 50. Glass Fiber Filter 8" x 10" of
TE-653 will be used for 24-Hour TSP monitoring and would be supplied by
laboratory. The general procedures
of sampling are described as below:-
Ÿ
A
horizontal platform with appropriate support to secure the samples against
gusty wind should be provided;
Ÿ
No
two samplers should be placed less than 2 meters apart;
Ÿ
The
distance between the sampler and an obstacle, such as building, must be at
least twice the height that the obstacle protrudes above the sample;
Ÿ
A
minimum of 2 meters of separation from any supporting structure, measured
horizontally is required;
Ÿ
Before
placing any filter media at the HVS, the power supply will be checked to ensure
the sampler work properly;
Ÿ
The
filter paper will be set to align on the screen of HVS to ensure that the
gasket formed an air tight seal on the outer edges of the filter. Then filter holder frame will be
tightened to the filter hold with swing bolts. The holding pressure should be
sufficient to avoid air leakage at the edge.
Ÿ
The
mechanical timer will be set for a sampling period of 24 hours (00:00 mid-night
to 00:00 mid-night next day).
Information will be recorded on the field data sheet, which would be
included the sampling data, starting time, the weather condition at current and
the filter paper ID with the initial weight;
Ÿ
After
sampling, the filter paper will be collected and transfer from the filter
holder of the HVS to a sealed envelope and sent to a local HOKLAS accredited
laboratory for quantifying.
3.6.6
All
the sampled 24-hour TSP filters will be collected and put into the
filter envelope provided by the laboratory. The sample will be kept in normal air conditioned
room conditions, i.e. 70% HR (Relative Humidity) and 25oC and delivery
to the office within 48 hours and sent to laboratory for analysis. The sampled filter will be kept in the
laboratory for six months
prior to disposal.
3.6.7
The
HVS used for 24-hour TSP monitoring will be calibrated before the commencement
for sampling, and after in two months interval for 1 point checking of
maintenance and six months interval for five points calibrate in accordance
with the manufacturer’s instruction using the NIST-certified standard
calibrator (TISCH Calibration Kit
Model TE-5025A) to establish a
relationship between the follow recorder meter reading in cfm (cubic feet per
minute) and the standard flow rate, Qstd, in m3/min. Motor brushes of HVS will be regularly replaced
of about five hundred hours per time.
Construction Noise
3.6.8
As
referred to in the Technical Memorandum (TM) issued under the NCO, sound level
meters in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1)
and 804:1985 (Type 1) specifications shall be used for carrying out the noise
monitoring. Immediately prior to and following each noise measurement the
accuracy of the sound level meter shall be checked using an acoustic calibrator
generating a known sound pressure level at a known frequency. Measurements may
be accepted as valid only if the calibration levels from before and after the
noise measurement agree to within 1.0 dB.
3.6.9
All
noise measurements will be performed with the meter set to FAST response and on
the A-weighted equivalent continuous sound pressure level (Leq). Leq(30 min) in six
consecutive Leq(5 min) measurements will be used as the
monitoring parameter for the time period between 07:00-19:00 hours on weekdays.
3.6.10
The
sound level meter will be mounted on a tripod at a height of 1.2 m and placed
at the assessment point and oriented such that the microphone is pointed to the
site with the microphone facing perpendicular to the line of sight. The
windshield will be fitted for all measurements. Where a
measurement is to be carried out at a building, the assessment point would
normally be at a position 1 m from the exterior of the building façade. Where a
measurement is to be made for noise being received at a place other than a
building, the assessment point would be at a position 1.2 m above the ground in
a free-field situation, i.e. at least 3.5 m away from reflective surfaces such
as adjacent buildings or walls.
3.6.11
Immediately
prior to and following each noise measurement the accuracy of the sound level
meter will be checked using an acoustic calibrator generating a known sound
pressure level at a known frequency.
Measurements will be accepted as valid only if the calibration level
from before and after the noise measurement agrees to within 1.0 dB.
3.6.12
Noise
measurements will not be made in fog, rain, wind with a steady speed exceeding
5m/s or wind with gusts exceeding 10m/s. The wind speed will be checked with a
portable wind speed meter capable of measuring the wind speed in m/s.
Water Quality (Marine) Monitoring
3.6.13
Marine
water quality monitoring will be conducted at the designated locations in
accordance with EM&A Manual. The operating and analytical of sampling
procedures are described as below:
Ÿ
A Global Positioning System (GPS) will be used to ensure
that the correct location was selected prior to sample collection. A portable, battery-operated echo
sounder will be used for the determination of water depth at each designated
monitoring station.
Ÿ
The
marine water sampler will be lowered into the water body at a predetermined
depth. The trigger system of the sampler is activated with a messenger and
opening ends of the sampler are closed accordingly then the sample of water is
collected.
Ÿ
During
the sampling, the sampling container will be rinsed to use a portion of the
marine water sample before the water sample is transferred to the
container. Upon sampling
completion, the container is sealed with a screw cap.
Ÿ
Before
the sampling process, general information such as the date and time of
sampling, weather condition and tidal condition as well as the personnel
responsible for the monitoring will be recorded on the monitoring field data
sheet.
Ÿ
In-situ
measurement including water temperature, turbidity, dissolved oxygen, salinity,
pH and water depth undertake at the identified monitoring point. At
each station, marine water samples are collected at three depths: 1m below
water surface, 1m above sea bottom and at mid-depth when the water depth
exceeds 6m. Samples at 1m below
water surface and 1m above sea bottom are collected when the water depth is
between 3m and 6m. Only 1 sample at
mid-depth is taken when the water depth is below 3m.
Ÿ For the in-situ
measurement, two consecutive measurements of sampling depth, temperature,
dissolved oxygen, salinity, turbidity and pH concentration will be measured at
the sea. The YSI ProDSS Multifunctional Meter is retrieved out of
the water after the first measurement and then re-deployed for the second
measurement. Where the difference
in the value between the first and second readings of each set is more than 25%
of the value of the first reading, the reading is discarded and further
readings is taken.
Ÿ
Water sample would be collected
by a
water sampler and then filled in high-density
polythene bottles. Before the water
sample storage, the sampling bottles will be pre-rinsed with the same water
sample. The sample bottles then is
packed in cool-boxes (cooled at 4OC without being frozen), and
delivered to HOKLAS accredited laboratory for the chemical analysis as followed
APHA Standard Methods.
Ÿ
The
laboratory has been comprehensive
quality assurance and quality control programmes. For QA/QC procedures, one duplicate
samples of every batch of 20 samples is analyzed as followed the HOKLAS
accredited requirement.
3.6.14
During marine
water sampling period, all in-situ measurement equipment will be calibrated at
three months interval accordingly. Except for the Current Velocity and
Direction water flow meter will be calibrated every
two years as recommended by the manufactory. Available calibration
certificates will be issued to ensure the performance of equipment to use for
in-situ measurement.
3.6.15
Before each
round of monitoring, the dissolved oxygen probe will be calibrated by wet bulb
method; a zero check in distilled water will be performed with the turbidity
and salinity probes; 4 and 10 values of the standard solution will be
undertaken to check the accuracy of pH value.
3.6.16
Valid calibration
certificates of monitoring equipment of air quality, construction noise and
water quality are shown in Appendix E.
Laboratory Analysis
3.6.17
Chemical
analysis will be conducted for all
water samples by a HOKALS accredited laboratory - ALS Technichem (HK) Pty Ltd. The
chemicals analysis method and reporting limit is shown Table
3-9.
Table 3-9 Testing
Method and Reporting Limit of the Chemical Analysis
|
Parameter
|
ALS Method Code
|
In-house Method
Reference 1
|
Reporting Limit
|
|
Total Suspended
Solids
|
EA025
|
APHA
2540D
|
2 mg/L
|
|
Chlorophyll-a
|
EP008F
|
APHA 10200 H2&H3
|
0.1 μg/L
|
Note: The exact method
shall depend on the laboratory accredited method. APHA =
Standard Methods for the Examination of Water and Wastewater by the American
Public Health Association.
3.7
Meteorological
Information
3.7.1
The
meteorological information including wind direction, wind speed, humidity,
rainfall, air pressure and temperature etc. during impact monitoring is extracted from the closest Hong Kong Observatory Station.
To obtain the most appropriate meteorological information where available, Air Temperature/Pressure and
Relative Humidity will be extracted from Tai Po Station and wind speed and
direction will be extracted from Tai Mei Tuk Station.
3.8
Determination
of Action/Limit (A/L) Levels
3.8.1
The
baseline results form the basis for determining the environmental acceptance
criteria for the impact monitoring.
A summary of the Action/Limit (A/L) Levels for air quality, construction
noise and water quality are shown in Table 3-10, 3-11 and 3-12 respectively.
Table 3-10 Action
and Limit Levels for Air Quality
|
Monitoring Station
|
Action Level (mg /m3)
|
Limit Level (mg/m3)
|
|
1-hour TSP
|
24-hour TSP
|
1-hour TSP
|
24-hour TSP
|
|
A4
|
275
|
142
|
500
|
260
|
|
A7
|
274
|
141
|
500
|
260
|
Table 3-11 Action
and Limit Levels for Construction Noise, dB(A)
|
Time
Period: 0700-1900 hours
on normal weekdays
|
|
Monitoring
Location
|
Action
Level
|
Limit
Level Note 1 &
Note 2
|
|
N1, N2a,
N3a, and N4
|
When one documented complaint is
received
|
75
|
Note 1: Acceptable Noise
Levels for school should be reduced to 70 dB(A) and65 dB(A) during
examination period
Note 2: If works are to be
carried out during restricted hours, the conditions stipulated in the construction noise permit issued by the NCA have to be
followed.
Table 3-12 Action and
Limit Levels for Water Quality
|
Monitoring Location
|
Action Level
|
Limit Level
|
|
Depth Average of SS (mg/L)
|
|
I1
|
7.0
|
OR 120% of any reference
stations at the same tide of the same day
|
7.5
|
OR 130% of any reference
stations at the same tide of the same day
|
|
I2
|
7.0
|
8.1
|
|
I3
|
8.3
|
15.0
|
|
W1
|
8.0
|
8.6
|
|
M1
|
10.0
|
11.0
|
|
FCZ1
|
7.0
|
8.0
|
|
Monitoring Location
|
Dissolved Oxygen (mg/L)
|
|
Depth Average of Surface &
Mid-depth
|
Bottom
|
Depth Average of Surface &
Mid-depth
|
Bottom
|
|
I1
|
5.08
|
N/A
|
4.80
|
N/A
|
|
I2
|
5.26
|
3.64
|
4.88
|
3.37
|
|
I3
|
5.03
|
4.09
|
4.77
|
3.19
|
|
W1
|
4.67
|
2.41
|
4.54
|
2.33
|
|
M1
|
4.73
|
N/A
|
4.70
|
N/A
|
|
FCZ1
|
5.00
|
3.43
|
5.00
|
3.18
|
|
Monitoring Location
|
Depth Average of Turbidity
(NTU)
|
|
I1
|
2.8
|
OR 120% of any reference
stations at the same tide of the same day
|
2.9
|
OR 130% of any
reference stations at the same tide of the same day
|
|
I2
|
3.5
|
7.7
|
|
I3
|
2.6
|
3.0
|
|
W1
|
2.9
|
3.3
|
|
M1
|
5.2
|
6.6
|
|
FCZ1
|
3.2
|
3.4
|
|
Monitoring
Location
|
Surface, Middle &
Bottom of Chlorophyll-a (μg/L)
|
|
I1
|
11.1
|
12.1
|
|
I2
|
11.0
|
13.1
|
|
I3
|
11.3
|
14.5
|
|
W1
|
11.3
|
16.1
|
|
M1
|
16.9
|
42.4
|
|
FCZ1
|
11.8
|
12.5
|
Notes:
(a)
For DO,
non-compliance of water quality limits occurs when monitoring result is lower
than the limits
(b)
For SS,
chlorophyll-a and turbidity, non-compliance of the
water quality limits occurs when monitoring result is higher than the limits.
(c)
Both Action and
Limit Levels for DO (surface and middle) in the FCZ1 are less than 5 mg/L.
Event Action Plan
3.8.2
Should non-compliance of the environmental quality criteria
occurs, remedial actions will be triggered according to the Event and Action
Plan which presented in Appendix F.
3.9
Data Management and Data QA/QC Control
3.9.1
The
impact monitoring data were handled by the ET’s in-house data recording and management system.
3.9.2
The
monitoring data recorded in the equipment were downloaded directly from the
equipment at the end of each monitoring day. The downloaded monitoring data were
input into a computerized database properly maintained by the ET. The laboratory results were input
directly into the computerized database and checked by personnel other than
those who input the data.
3.9.3
For
monitoring parameters that require laboratory analysis, the local laboratory
shall follow the QA/QC requirements as set out under the HOKLAS scheme for the
relevant laboratory tests.
4.
Air Quality Monitoring
4.1
General
4.1.1
In
the Reporting Period, air
quality monitoring were performed at the proposed monitoring locations A4 and
A7. The air quality monitoring
schedule is presented in Appendix G and the monitoring results are summarized
in the following sub-sections.
4.2
Results
of Air Quality Monitoring
4.2.1
In
the Reporting Period, 5 sessions of 1-hour TSP and 5 sessions of 24-hours TSP
monitoring were carried out and the monitoring results are summarized in Tables
4-1 to 4-4. The detailed 24-hour TSP
monitoring data are presented in Appendix H and the relevant graphical plots are
shown in Appendix I.
Table 4-1 Summary
of 24-hour and 1-hour TSP Monitoring Results (A4)
|
Date
|
24-hour TSP (mg/m3)
|
1-hour TSP (mg/m3)
|
|
Date
|
Start Time
|
1st reading
|
2nd reading
|
3rd reading
|
|
3-Apr-18
|
48
|
4-Apr-18
|
9:41
|
45
|
49
|
52
|
|
9-Apr-18
|
53
|
10-Apr-18
|
13:19
|
56
|
55
|
56
|
|
14-Apr-18
|
27
|
16-Apr-18
|
9:44
|
43
|
46
|
52
|
|
20-Apr-18
|
67
|
21-Apr-18
|
9:37
|
46
|
47
|
49
|
|
26-Apr-18
|
70
|
27-Apr-18
|
9:42
|
149
|
146
|
147
|
|
Average
(Range)
|
53
(27 – 70)
|
Average
(Range)
|
69
(43 – 149)
|
Table 4-2 Summary
of 24-hour and 1-hour TSP Monitoring Results (A7)
|
Date
|
24-hour TSP (mg/m3)
|
1-hour TSP (mg/m3)
|
|
Date
|
Start Time
|
1st reading
|
2nd reading
|
3rd reading
|
|
3-Apr-18
|
34
|
4-Apr-18
|
9:30
|
46
|
44
|
49
|
|
9-Apr-18
|
91
|
10-Apr-18
|
9:32
|
64
|
59
|
62
|
|
14-Apr-18
|
32
|
16-Apr-18
|
9:34
|
47
|
52
|
56
|
|
20-Apr-18
|
82
|
21-Apr-18
|
9:49
|
51
|
53
|
52
|
|
26-Apr-18
|
74
|
27-Apr-18
|
13:03
|
152
|
160
|
156
|
|
Average
(Range)
|
63
(32 – 91)
|
Average
(Range)
|
74
(44 – 160)
|
4.2.2
As
shown in Tables 4-1 to 4-2,
all the 1-hour TSP and 24-hour TSP monitoring results were below the
Action/Limit Levels. No Notification
of Exceedance (NOE) was issued in this Reporting Period.
4.2.3
The
meteorological data during the impact
monitoring period are summarized in Appendix J.
5.
Construction Noise Monitoring
5.1
General
5.1.1
In
the Reporting Period, construction
noise quality monitoring were performed at the designated monitoring locations N1, N2a,
N3a and N4. The noise quality monitoring schedule is presented
in Appendix G
and the monitoring results are summarized in the following sub-sections.
5.2
Results
of Noise Monitoring
5.2.1
